What does the CASE statement do in SQL?Defines a new case for the databaseAdds a case to a tableAdds a condition to a queryAdds a new user to the database

The CASE statement in SQL is used to add a condition to a query. It allows you to perform conditional logic in SQL queries by returning specific values based on certain conditions. It's similar to the IF-THEN-ELSE statement in other programming languages. Here's a basic example:

SELECT column_name,
CASE
    WHEN condition1 THEN result1
    WHEN condition2 THEN result2
    ...
    ELSE result
END
FROM table_name;

In this example, the CASE statement goes through conditions and returns a value when the first condition is met. If no conditions are true, it returns the value in the ELSE clause. If there is no ELSE part and no conditions are true, it returns NULL.